The fix for this can be done by modifying category.php file to this
<?php get_header(); ?>
<!-- Main Content -->
<div class="container" id="main-container">
<div class="row">
<?php get_exray_primary_sidebar(); ?>
<?php get_exray_content_html_opening(); ?>
<?php Exray::load_breadcrumb(); ?>
<div class="content" role="main">
<?php if(have_posts()) : ?>
<div class="top-content">
<h5><?php single_cat_title( __('More from: ', 'exray-framework'), true ); ?></h5>
<hr class="content-separator">
</div>
<?php while(have_posts()) : the_post(); ?>
<!-- The Loop of Post -->
<?php get_template_part('content', get_post_format()); ?>
<!-- If post format content, show post format content items -->
<?php endwhile; else : ?>
<!-- If no Post Found -->
<h1><?php _e("No post were Found", "exray-framework") ?></h1>
<?php endif; ?>
<!-- Pagination for older / newer post -->
<nav class="pagination clearfix" id="nav-below" role="navigation">
<p class="article-nav-prev"><?php next_posts_link(__('← Older Post', 'exray-framework')); ?></p>
<p class="article-nav-next"><?php previous_posts_link(__('Newer Post → ', 'exray-framework')); ?></p>
</nav>
</div>
<!-- end content -->
</div>
<!-- end span6 main -->
<div id="primary" class="widget-area span3 main-sidebar" role="complementary">
<?php get_sidebar('sidebar'); ?>
</div>
<!-- end span3 primary left-sidebar -->
<?php get_exray_secondary_sidebar(); ?>
</div>
<!--End row -->
</div>
<!-- End Container -->
<!-- End Main Content -->
<?php get_footer(); ?>
These lines are the fix in the above
<!-- Pagination for older / newer post -->
<nav class="pagination clearfix" id="nav-below" role="navigation">
<p class="article-nav-prev"><?php next_posts_link(__('← Older Post', 'exray-framework')); ?></p>
<p class="article-nav-next"><?php previous_posts_link(__('Newer Post → ', 'exray-framework')); ?></p>
